
  @keyframes rotate{
    0%{
        transform: rotate(0);
      }
    100%{
         transform: rotate(360deg);
      }
  }
.ActivityIndicator{
  width: 100px;
  height: 100px;
  transition: 0.5s;
  transform-origin: 50px 50px;  
  animation: rotate 1s linear infinite;  /*开始动画后无限循环，用来控制rotate*/

}